Gardenia jasminoides Ellis, also known as Gardenia jasminoides Ellis, is an evergreen shrub of Rubiaceae and Gardenia. Gardenia has lush foliage, evergreen leaves, fragrant and elegant flowers, and green leaves and white flowers are particularly beautiful and lovely. Many flower friends like potted gardenias, waiting for the flowers to bloom and see their elegant demeanor, but there are always problems during the maintenance period. For example, when gardenias are pregnant with buds, they sit and wait to enjoy the flowers. At this time, the buds turn yellow, which is very distressing and I don't know what to do. What is the reason why gardenia buds turn yellow? How to solve it? Maintenance tips: Gardenia likes warm, humid and sunny environment. It is tolerant of semi-shade, relatively cold, and afraid of stagnant water. The suitable temperature for growth is 16-18 degrees. Too high or too low temperature is not conducive to plant growth. The natural flowering period is from May to August, and it requires loose, breathable, well-drained and fertile acidic soil.

1. The bud of gardenia turns yellow due to soil alkalization and hardening

Gardenia likes acidic soil, and it needs to be constantly applied with water and fertilizer during its growth, especially in the northern area, where the soil is more alkaline, which is very unfavorable for the growth of gardenia. If the culture medium is too sticky and the air permeability is poor, the soil will harden easily after a long time, and the root system of the soil will not breathe well due to lack of oxygen, so it is difficult to absorb enough nutrients and water for the plants to grow and bloom, which will lead to the gardenia flower bud turning yellow before opening.

solution: gardenia buds turn yellow due to soil discomfort, so the soil environment should be improved in time. If the hardening is not serious, the soil can be loosened with a small shovel, and an appropriate amount of ferrous sulfate is poured to neutralize the alkaline substances in the soil and keep the soil slightly acidic. In order to promote the plant to return to normal as soon as possible, most flower buds can be cut off to reduce the consumption of nutrients.

Maintenance suggestion: In order to avoid soil hardening, the soil used for gardenia cultivation must pay attention to the air permeability and drainage performance of the soil, and be mixed with a variety of soils, such as humus soil, pastoral soil and river sand, which are evenly mixed according to the ratio of 4:2:1, and an appropriate amount of fish bone powder is added as the base fertilizer, which is more conducive to plant growth. In order to prevent the alkalization of the cultivation substrate, a small amount of ferrous sulfate can be added regularly when watering to maintain the slight acidity of the soil.

Second, excessive watering at flowering stage causes the gardenia buds to turn yellow

Many flower friends think that gardenia needs enough water to bloom, and then they can't control it and water it from time to time. Gardenia likes to be wet and needs a lot of water for flowering, but if the soil is watered too frequently or excessively for a long time, the oxygen content in the soil will decrease continuously, so the root system of the plant will breathe badly due to lack of oxygen, and in severe cases, the root system will rot. Once the root system has problems, it will be difficult to transport enough water and nutrients for the plant to bloom, and then the flower buds will turn yellow and fall off.

solution: if the gardenia buds turn yellow due to excessive watering at flowering stage, then the watering should be stopped first, and the plants should be moved to a well-ventilated place to speed up water evaporation and dry the soil as soon as possible. In addition, to cut off the yellow buds, it is best to trim some normal buds appropriately to reduce energy consumption.

Maintenance suggestion: Gardenia likes humid growth environment, and needs sufficient water during growth, but it is afraid of water accumulation, so watering Gardenia must be carried out reasonably. In the vigorous growth period of gardenia, the amount of watering can be appropriately increased, and water can be sprayed on the leaves of plants to keep moisture. In the flowering period, watering should be appropriately reduced to keep the soil moist and not wet, so as to avoid falling buds due to excessive watering. When it is cold in winter, watering should not be too much to prevent root rot.

Third, the lack of nutrients causes the flower bud of gardenia to turn yellow

Gardenia is a fertilizer-loving flower plant, and it needs a lot of nutrients to promote the flowering of the plant in the bud-rearing period. If the nutrients are insufficient at this time, or the amount of nitrogen fertilizer and phosphorus and potassium fertilizer is small, the plant will be difficult to bloom because of the lack of nutrients, and the flower bud will turn yellow before opening.

Solution: If the gardenia flower bud turns yellow due to insufficient nutrients, then a part of the flower bud should be pruned to reduce nutrient consumption, so as to prevent the plant from being "exhausted". At the same time, phosphorus and potassium fertilizer were applied to gardenia in time to promote the remaining buds to bloom.

Maintenance suggestion: Gardenia has a high demand for nutrients. In order to meet the demand for nutrients during the growth of Gardenia, we can apply decomposed bean cake and sesame sauce residue once every half month in the vigorous growth period of the plant to promote the growth of the plant. Before flowering, it is necessary to apply phosphorus and potassium fertilizer continuously for 1-2 times, or spray potassium dihydrogen phosphate to promote flower bud differentiation, which is conducive to more flowers. In addition, when the temperature is too high or too low, the use of fertilizer should be reduced to avoid fertilizer damage.

fourth, the flower bud of gardenia turns yellow due to pest erosion

The natural flowering period of gardenia is from May to August, that is, in hot summer. If there is poor ventilation in high temperature weather, it is easy to be infected with pests, such as aphids and borers. If the pests eat in the flower bud, it is not easy to be found. After a long time, the flower bud will turn yellow and fall off.

solution: the subject can open the yellow bud for observation, or carefully observe whether there are pests on the tender branches and leaves. Remove the yellow buds in time and burn them to avoid infecting other healthy flowers and leaves, and then spray dimethoate to kill them.

Maintenance suggestion: Because pests and diseases are easy to occur in high temperature, high humidity and poor ventilation, the ventilation of the maintenance position should be ensured first during the cultivation of gardenia, so as to avoid the place being too hidden. Then properly control the application of water and fertilizer, so as not to keep the soil wet for a long time. In summer, when the temperature continues to be high, the plants should be properly cooled, and the windows should be opened frequently for ventilation during indoor maintenance, so as to fundamentally prevent the occurrence of pests and diseases.

Conclusion: The common causes of gardenia flower buds turning yellow before opening are soil alkalization hardening, excessive watering at flowering stage, insufficient nutrients and insect erosion. The author can find out the specific reasons for treatment according to his own maintenance conditions. In addition, during the maintenance period of gardenia, it is necessary to ensure good ventilation of the environment and properly control the application of water and fertilizer to avoid gardenia being in a high temperature and high humidity environment for a long time.